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Type:
Bug
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Resolution: Works as Designed
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Priority:
Major - P3
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None
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Affects Version/s: 3.10.2
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Component/s: Codecs
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Labels:None
When encoding POJOs of code-generated [Avro|https://avro.apache.org/] classes, the AutomaticPojoCodec fails with the error below. I have used the documentation to encode POJOs into MongoDB Documents, but can not make it work with the Avro classes. This part of the documentation has been added to the MongoDB java driver, to make automatic POJO encoding work: https://mongodb.github.io/mongo-java-driver/3.10/driver/getting-started/quick-start-pojo/#creating-a-custom-codecregistry
My java classes are being auto-generated from Avro schemas by using the Avro Maven plugin. Essentially, you drop in a Avro schema file into your project and the Maven plugin will use Avros code generation to create the java classes. These classes are not meant to be changed by the user after code generation.
The error I get when encoding Avro classes is:
org.bson.codecs.configuration.CodecConfigurationException: An exception occurred when encoding using the AutomaticPojoCodec.Encoding a ClientRoleRequest: '{JSON_PAYLOAD_DATA_HERE}' failed with the following exception:Failed to encode 'ClientRoleRequest'. Encoding 'classSchema' errored with:
An exception occurred when encoding using the AutomaticPojoCodec.Encoding a RecordSchema:
'{MY_AVRO_SCHEMA_HERE}' failed with the following exception:
Unable to get value for property 'aliases' in RecordSchemaA custom Codec or PojoCodec may need to be explicitly configured
and registered to handle this type.A custom Codec or PojoCodec may need to be explicitly configured and registered to handle
this type.
at org.bson.codecs.pojo.AutomaticPojoCodec.encode(AutomaticPojoCodec.java:53)
at org.bson.codecs.BsonDocumentWrapperCodec.encode(BsonDocumentWrapperCodec.java:63)
at org.bson.codecs.BsonDocumentWrapperCodec.encode(BsonDocumentWrapperCodec.java:29)
at com.mongodb.operation.BulkWriteBatch$WriteRequestEncoder.encode(BulkWriteBatch.java:398)
at com.mongodb.operation.BulkWriteBatch$WriteRequestEncoder.encode(BulkWriteBatch.java:377)
at org.bson.codecs.BsonDocumentWrapperCodec.encode(BsonDocumentWrapperCodec.java:63)
at org.bson.codecs.BsonDocumentWrapperCodec.encode(BsonDocumentWrapperCodec.java:29)at com.mongodb.internal.connection.BsonWriterHelper.writeDocument(BsonWriterHelper.java:75)
at com.mongodb.internal.connection.BsonWriterHelper.writePayload(BsonWriterHelper.java:59)
at com.mongodb.internal.connection.CommandMessage.encodeMessageBodyWithMetadata(CommandMessage.java:146)
at com.mongodb.internal.connection.RequestMessage.encode(RequestMessage.java:138)
at com.mongodb.internal.connection.CommandMessage.encode(CommandMessage.java:60)
at com.mongodb.internal.connection.InternalStreamConnection.sendAndReceiveAsync(InternalStreamConnection.java:325)
at com.mongodb.internal.connection.UsageTrackingInternalConnection.sendAndReceiveAsync(UsageTrackingInternalConnection.java:114)
at com.mongodb.internal.connection.DefaultConnectionPool$PooledConnection.sendAndReceiveAsync(DefaultConnectionPool.java:455)
at com.mongodb.internal.connection.CommandProtocolImpl.executeAsync(CommandProtocolImpl.java:78)
at com.mongodb.internal.connection.DefaultServer$DefaultServerProtocolExecutor.executeAsync(DefaultServer.java:215)
at com.mongodb.internal.connection.DefaultServerConnection.executeProtocolAsync(DefaultServerConnection.java:285)
at com.mongodb.internal.connection.DefaultServerConnection.commandAsync(DefaultServerConnection.java:156)
at com.mongodb.operation.MixedBulkWriteOperation.executeCommandAsync(MixedBulkWriteOperation.java:442)
at com.mongodb.operation.MixedBulkWriteOperation.executeBatchesAsync(MixedBulkWriteOperation.java:348)
at com.mongodb.operation.MixedBulkWriteOperation.access$900(MixedBulkWriteOperation.java:70)
at com.mongodb.operation.MixedBulkWriteOperation$2$1.call(MixedBulkWriteOperation.java:237)
at com.mongodb.operation.OperationHelper.validateWriteRequests(OperationHelper.java:177)
at com.mongodb.operation.MixedBulkWriteOperation$2.call(MixedBulkWriteOperation.java:220)
at com.mongodb.operation.OperationHelper$7.onResult(OperationHelper.java:517)
at com.mongodb.operation.OperationHelper$7.onResult(OperationHelper.java:514)
at com.mongodb.internal.connection.DefaultServer$1.onResult(DefaultServer.java:109)
at com.mongodb.internal.connection.DefaultServer$1.onResult(DefaultServer.java:98)
at com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:49)
at com.mongodb.internal.connection.DefaultConnectionPool$2.onResult(DefaultConnectionPool.java:213)
at com.mongodb.internal.connection.DefaultConnectionPool$2.onResult(DefaultConnectionPool.java:198)at com.mongodb.internal.connection.UsageTrackingInternalConnection$1.onResult(UsageTrackingInternalConnection.java:65)
at com.mongodb.internal.connection.UsageTrackingInternalConnection$1.onResult(UsageTrackingInternalConnection.java:57)
at com.mongodb.internal.connection.InternalStreamConnection$1$1.onResult(InternalStreamConnection.java:166)
at com.mongodb.internal.connection.InternalStreamConnection$1$1.onResult(InternalStreamConnection.java:153)at com.mongodb.internal.connection.InternalStreamConnectionInitializer$3.onResult(InternalStreamConnectionInitializer.java:215)at com.mongodb.internal.connection.InternalStreamConnectionInitializer$3.onResult(InternalStreamConnectionInitializer.java:209)at com.mongodb.internal.connection.CommandHelper$1.onResult(CommandHelper.java:59)at com.mongodb.internal.connection.CommandHelper$1.onResult(CommandHelper.java:53)at com.mongodb.internal.connection.InternalStreamConnection$2$1.onResult(InternalStreamConnection.java:395)at com.mongodb.internal.connection.InternalStreamConnection$2$1.onResult(InternalStreamConnection.java:372)at com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback$MessageCallback.onResult(InternalStreamConnection.java:667)at com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback$MessageCallback.onResult(InternalStreamConnection.java:634)at com.mongodb.internal.connection.InternalStreamConnection$5.completed(InternalStreamConnection.java:510)at com.mongodb.internal.connection.InternalStreamConnection$5.completed(InternalStreamConnection.java:507)at com.mongodb.internal.connection.AsynchronousChannelStream$BasicCompletionHandler.completed(AsynchronousChannelStream.java:220)at com.mongodb.internal.connection.AsynchronousChannelStream$BasicCompletionHandler.completed(AsynchronousChannelStream.java:203)at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)at com.mongodb.internal.connection.AsynchronousSocketChannelStream$AsynchronousSocketChannelAdapter.read(AsynchronousSocketChannelStream.java:137)at com.mongodb.internal.connection.AsynchronousChannelStream.readAsync(AsynchronousChannelStream.java:105)at com.mongodb.internal.connection.InternalStreamConnection.readAsync(InternalStreamConnection.java:507)at com.mongodb.internal.connection.InternalStreamConnection.access$1000(InternalStreamConnection.java:74)at com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback.onResult(InternalStreamConnection.java:624)at com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback.onResult(InternalStreamConnection.java:609)at com.mongodb.internal.connection.InternalStreamConnection$5.completed(InternalStreamConnection.java:510)at com.mongodb.internal.connection.InternalStreamConnection$5.completed(InternalStreamConnection.java:507)at com.mongodb.internal.connection.AsynchronousChannelStream$BasicCompletionHandler.completed(AsynchronousChannelStream.java:220)at com.mongodb.internal.connection.AsynchronousChannelStream$BasicCompletionHandler.completed(AsynchronousChannelStream.java:203)at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)at sun.nio.ch.UnixAsynchronousSocketChannelImpl.finishRead(UnixAsynchronousSocketChannelImpl.java:430)at sun.nio.ch.UnixAsynchronousSocketChannelImpl.finish(UnixAsynchronousSocketChannelImpl.java:191)at sun.nio.ch.UnixAsynchronousSocketChannelImpl.onEvent(UnixAsynchronousSocketChannelImpl.java:213)at sun.nio.ch.EPollPort$EventHandlerTask.run(EPollPort.java:293)at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)
Unable to get value for property 'aliases' in RecordSchemaA custom Codec or PojoCodec may need to be explicitly configured and registered to handle this type.at org.bson.codecs.pojo.PojoCodecImpl.encodeValue(PojoCodecImpl.java:182)at org.bson.codecs.pojo.PojoCodecImpl.encodeProperty(PojoCodecImpl.java:168)at org.bson.codecs.pojo.PojoCodecImpl.encode(PojoCodecImpl.java:105)at org.bson.codecs.pojo.AutomaticPojoCodec.encode(AutomaticPojoCodec.java:50)... 71 moreCaused by: org.bson.codecs.configuration.CodecConfigurationException: An exception occurred when encoding using the AutomaticPojoCodec.Encoding a RecordSchema: '{MY_AVRO_SCHEMA_HERE}' failed with the following exception:Unable to get value for property 'aliases' in RecordSchemaA custom Codec or PojoCodec may need to be explicitly configured and registered to handle this type.at org.bson.codecs.pojo.AutomaticPojoCodec.encode(AutomaticPojoCodec.java:53)at org.bson.codecs.pojo.PojoCodecImpl.encode(PojoCodecImpl.java:109)at org.bson.codecs.pojo.LazyPojoCodec.encode(LazyPojoCodec.java:47)at org.bson.codecs.EncoderContext.encodeWithChildContext(EncoderContext.java:91)at org.bson.codecs.pojo.PojoCodecImpl.encodeValue(PojoCodecImpl.java:180)... 74 moreCaused by: org.bson.codecs.configuration.CodecConfigurationException: Unable to get value for property 'aliases' in RecordSchemaat org.bson.codecs.pojo.PropertyAccessorImpl.getError(PropertyAccessorImpl.java:69)at org.bson.codecs.pojo.PropertyAccessorImpl.get(PropertyAccessorImpl.java:45)at org.bson.codecs.pojo.PojoCodecImpl.encodeProperty(PojoCodecImpl.java:167)at org.bson.codecs.pojo.PojoCodecImpl.encode(PojoCodecImpl.java:105)at org.bson.codecs.pojo.AutomaticPojoCodec.encode(AutomaticPojoCodec.java:50)... 78 moreCaused by: java.lang.IllegalAccessException: Class org.bson.codecs.pojo.PropertyAccessorImpl can not access a member of class org.apache.avro.Schema$NamedSchema with modifiers "public"at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:102)at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:296)at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:288)at java.lang.reflect.Method.invoke(Method.java:491)at org.bson.codecs.pojo.PropertyAccessorImpl.get(PropertyAccessorImpl.java:37)... 81 more